1j4j
From Proteopedia
Crystal Structure of Tabtoxin Resistance Protein (form II) complexed with an Acyl Coenzyme A
Overview
Tabtoxin resistance protein (TTR) is an enzyme that renders tabtoxin-producing pathogens, such as Pseudomonas syringae, tolerant to their own phytotoxins. Here, we report the crystal structure of TTR complexed with its natural cofactor, acetyl coenzyme A (AcCoA), to 1.55A resolution. The binary complex forms a characteristic "V" shape for substrate binding and contains the four motifs conserved in the GCN5-related N-acetyltransferase (GNAT) superfamily, which also includes the histone acetyltransferases (HATs). A single-step mechanism is proposed to explain the function of three conserved residues, Glu92, Asp130 and Tyr141, in catalyzing the acetyl group transfer to its substrate. We also report that TTR possesses HAT activity and suggest an evolutionary relationship between TTR and other GNAT members.
About this Structure
1J4J is a Single protein structure of sequence from Pseudomonas syringae pv. tabaci. Full crystallographic information is available from OCA.
Reference
Crystal structure of tabtoxin resistance protein complexed with acetyl coenzyme A reveals the mechanism for beta-lactam acetylation., He H, Ding Y, Bartlam M, Sun F, Le Y, Qin X, Tang H, Zhang R, Joachimiak A, Liu J, Zhao N, Rao Z, J Mol Biol. 2003 Jan 31;325(5):1019-30. PMID:12527305 Page seeded by OCA on Fri May 2 20:47:40 2008
Categories: Pseudomonas syringae pv. tabaci | Single protein | Bartlam, M. | Cao, Z. | Ding, Y. | Duke, N. | He, H. | Jiang, F. | Joachimiak, A. | Liu, J. | Liu, Y. | Rao, Z. | Shao, Y. | Tang, H. | Zhang, R. | Zhao, N. | Transferase
